Molded case circuit breaker electric operating mechanism

Abstract

The present invention relates to a molded case circuit breaker assembly, specifically, an electric operating mechanism of a molded case circuit breaker. It includes a box body, a controller and an electric drive mechanism in the box body, and the electric drive mechanism is electrically connected to the controller. It is characterized in that a support plate is provided in the box body, a limit hole is provided on the support plate, and a push rod is provided in the limit hole. A rotating sleeve is provided in the box body on one side of the push rod, an outer boss is provided on the outer wall of the rotating sleeve, and the side surface of the outer boss away from the front of the box body is spiral-shaped, and a connecting rod is provided on the push rod, and the connecting rod and the spiral surface of the outer boss are against each other. There is a lock hole on the front of the box body corresponding to the rotating sleeve, and a mechanical lock is fixed in the lock hole. There is a first micro switch in the box body, and the first micro switch is electrically connected to the controller. The first micro switch is located on one side of the rotating sleeve, and there is a protrusion on the side wall of the rotating sleeve corresponding to the first micro switch. The use of this electric operating mechanism can avoid safety hazards.

Description

Technical Field

[0001] The invention relates to a molded case circuit breaker component, in particular to a molded case circuit breaker electric operating mechanism for remotely controlling the opening and closing of the molded case circuit breaker. Background Art

[0002] With the introduction and development of the concept of ubiquitous power Internet of Things, the requirements for intelligent and remote control of molded case circuit breakers in low-voltage power distribution networks have become increasingly prominent. Molded case circuit breakers play an important role in connecting and protecting electrical equipment in low-voltage power distribution networks. Conventional molded case circuit breakers do not have remote control functions and cannot meet the requirements of ubiquitous power Internet of Things. This problem needs to be solved by adding electric operating mechanisms.

[0003] At present, the electric operating mechanism of the molded case circuit breaker used in the power industry includes a box body, in which there are a controller and an electric drive mechanism. When in use, the electric drive mechanism is connected to the molded case circuit breaker, and the controller is connected to the Internet of Things control terminal. The opening and closing requirements are sent to the controller through the Internet of Things control terminal, and the controller controls the electric drive mechanism to drive the molded case circuit breaker to realize automatic opening and closing, thereby realizing the remote control function. However, when the molded case circuit breaker using this electric operating mechanism is opened for equipment maintenance, there will be misoperation, and electric closing will occur, which will cause safety hazards to the staff performing equipment maintenance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electric operating mechanism for a molded case circuit breaker, by which safety hazards can be avoided.

[0005] In order to solve the above problems, the following technical solutions are provided:

[0006] The electric operating mechanism of the molded case circuit breaker of the present invention comprises a box body, a controller and an electric drive mechanism are arranged in the box body, and the electric drive mechanism and the controller are electrically connected. It is characterized in that a vertically arranged support plate is arranged in the box body, a limit hole is arranged in the support plate, a push rod is arranged in the limit hole, the push rod is perpendicular to the front of the box body, and the two ends of the push rod extend from the two sides of the support plate respectively, and the push rod and the limit hole are slidably matched. A rotating sleeve is arranged in the box body on one side of the push rod, the rotating sleeve is parallel to the push rod, an outer boss is arranged on the outer wall of the rotating sleeve, and the outer boss surface away from the front of the box body is spiral, and a radially arranged connecting rod is arranged on the push rod, and the connecting rod and the spiral surface of the outer boss are against each other. There is a lock hole on the front of the box body corresponding to the rotating sleeve, and a mechanical lock is fixed in the lock hole, and the rotating lock core of the mechanical lock is concentrically fixedly connected with the rotating sleeve. The box body contains a first micro switch which is electrically connected to the controller. The first micro switch is located on one side of the rotating sleeve. A protrusion is provided on the side wall of the rotating sleeve corresponding to the first micro switch. When the connecting rod is located at the high point of the spiral end face of the rotating sleeve, the protrusion abuts against the spring of the first micro switch, and the controller stops working.

[0007] Among them, there is a first clearance hole on the support plate corresponding to the rotating sleeve, one end of the rotating sleeve and the external boss are both located in the first clearance hole, the rotating sleeve and the external boss are rotationally matched with the first clearance hole, and a first through groove is provided on the support plate between the limiting hole and the first clearance hole, so that the limiting hole is connected to the first clearance hole, and the connecting rod is located in the first through groove.

[0008] A clearance hole is arranged on the front side of the box body corresponding to the push rod, and a push column is arranged in the clearance hole. The push column and the clearance hole are matched in a sliding manner, and the push column and the push rod are concentrically fixedly connected.

[0009] The back of the box body is open. The electric drive mechanism includes a rotating shaft, a second micro switch, a third micro switch and a motor. The second micro switch, the third micro switch and the motor are electrically connected to the controller. The rotating shaft and the motor are both located on the support plate. The two sides of the rotating shaft extend out from the two sides of the support plate respectively. The rotating shaft and the support plate are in rotational cooperation. There is an output gear on the rotating shaft. The output shaft of the motor is in linkage cooperation with the output gear. A fan-shaped piece is concentrically fixed on the rotating shaft between the support plate and the back of the box body. The fan-shaped piece is parallel to the support plate. There is a guide rod between the fan-shaped piece and the back of the box body. There is a slider on the guide rod. An eccentric pin is fixed on one side of the fan-shaped piece close to the slider. The eccentric pin is perpendicular to the fan-shaped piece. There is a bidirectional bearing on the eccentric pin. There is a second through slot on the side of the slider corresponding to the bidirectional bearing. The second through slot is perpendicular to the guide rod. The bidirectional bearing is located in the second through slot. The second micro switch and the fan-shaped piece are in the same vertical plane, and the distance between the spring of the second micro switch and the rotating shaft is the same as that of the fan-shaped piece. The radii of the fan-shaped pieces are equal, the third microswitch and the slider are in the same vertical plane, and the distance from the spring piece of the third microswitch to the rotating shaft is equal to the distance from the side wall of the slider to the rotating shaft. When the rotating shaft drives the slider to slide to the side away from the third microswitch through the fan-shaped piece, the slider leaves the spring piece of the third microswitch, and the fan-shaped piece resists the spring piece of the second microswitch. When the rotating shaft drives the slider to slide to the side close to the third microswitch through the fan-shaped piece, the fan-shaped piece leaves the spring piece of the second microswitch, and the slider resists the spring piece of the third microswitch.

[0010] The output gear is located between the support plate and the front face of the box body. A driving gear is fixed on the output shaft of the motor. The driving gear is connected to the output gear through a reduction gear set, so that the output shaft of the motor and the output gear are in linkage cooperation.

[0011] The output gear is connected to the rotating shaft through a one-way bearing; a second clearance hole is provided on the front side of the box body corresponding to the rotating shaft, one end of the rotating shaft is located in the second clearance hole, and the two are matched in a rotating state, and a rotating groove is provided on the end surface of the rotating shaft.

[0012] An opening button, a closing button and a power switch are arranged on the front of the box body, and a wiring head is arranged on the side wall of the box body. The wiring head, the power switch, the opening button and the closing button are electrically connected to the controller.

[0013] An information display screen is arranged on the front side of the box body, an operation button is connected to the information display screen, and the information display screen is electrically connected to the controller.

[0014] The above solution has the following advantages:

[0015] Since the box body of the electric operating mechanism of the molded case circuit breaker of the present invention has a vertically arranged support plate, a limit hole on the support plate, a push rod in the limit hole, a rotating sleeve in the box body on one side of the push rod, an outer boss on the outer wall of the rotating sleeve, the outer boss away from the front of the box body is spiral, a radially arranged connecting rod on the push rod, the connecting rod and the spiral surface of the outer boss are against each other, a lock hole is provided on the front of the box body corresponding to the rotating sleeve, a mechanical lock is fixed in the lock hole, the rotating lock core of the mechanical lock is connected to the rotating sleeve, a first micro switch is provided in the box body, the first micro switch is electrically connected to the controller, the first micro switch is located on one side of the rotating sleeve, and a protrusion is provided on the side wall of the rotating sleeve corresponding to the first micro switch. When in use, the electric drive mechanism is connected to the handle of the molded case circuit breaker, the push rod is against the release button of the molded case circuit breaker, and the controller is connected to the Internet of Things control terminal. When the molded case circuit breaker using this electric operating mechanism is opened for equipment maintenance, the staff uses the key to turn the lock cylinder to drive the rotating sleeve to rotate. The spiral surface of the outer boss drives the push rod through the connecting rod to push the molded case circuit breaker release button, so that the circuit breaker is in a release state, ensuring that the molded case circuit breaker cannot be closed when the manual operating handle is used; at the same time, the protrusion of the rotating sleeve presses the first microswitch reed to stop the controller from working and not receiving signals. Even if the Internet of Things control terminal sends a closing signal, the controller will not control the electric operating mechanism to perform a closing action, thereby ensuring that the molded case circuit breaker will not be closed due to misoperation, avoiding safety hazards when the staff are repairing the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the electric operating mechanism of the molded case circuit breaker of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the electric operating mechanism of the molded case circuit breaker of the present invention after the box body is hidden;

[0018] Figure 3 It is a three-dimensional schematic diagram of the electric operating mechanism of the molded case circuit breaker of the present invention in a rear view state. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 3 As shown, the electric operating mechanism of the molded case circuit breaker of the present invention comprises a box body 1, wherein the box body 1 has a controller 17 and an electric drive mechanism, and the electric drive mechanism is electrically connected to the controller 17. A vertically arranged support plate 30 is arranged in the box body 1, and a limit hole is arranged on the support plate 30. A push rod 15 is arranged in the limit hole. The push rod 15 is perpendicular to the front of the box body 1, and the two ends of the push rod 15 extend from the two sides of the support plate 30 respectively, and the push rod 15 and the limit hole are slidably matched. A rotating sleeve 16 is arranged in the box body 1 on one side of the push rod 15, and the rotating sleeve 16 is parallel to the push rod 15. An outer boss 14 is arranged on the outer wall of the rotating sleeve 16, and the outer boss 14 away from the front of the box body 1 is spiral. A radially arranged connecting rod 29 is arranged on the push rod 15, and the connecting rod 29 is against the spiral surface of the outer boss 14. A lock hole is arranged on the front of the box body 1 corresponding to the rotating sleeve 16, and a mechanical lock 2 is fixed in the lock hole. The rotating lock core of the mechanical lock 2 is concentrically fixedly connected with the rotating sleeve 16. A first micro switch 12 is arranged in the box body 1, and the first micro switch 12 is electrically connected to the controller 17. The first micro switch 12 is located on one side of the rotating sleeve 16, and a protrusion 13 is arranged on the side wall of the rotating sleeve 16 corresponding to the first micro switch 12. When the connecting rod 29 is located at the high point of the spiral end face of the rotating sleeve 16, the protrusion 13 abuts against the spring of the first micro switch 12, and the controller 17 stops working.

[0021] The support plate 30 corresponding to the rotating sleeve 16 is provided with a first clearance hole, one end of the rotating sleeve 16 and the outer boss 14 are both located in the first clearance hole, the rotating sleeve 16 and the outer boss 14 are rotationally matched with the first clearance hole, and the section of the support plate 30 between the limiting hole and the first clearance hole is provided with a first through groove, so that the limiting hole is connected to the first clearance hole, and the connecting rod 29 is located in the first through groove.

[0022] The front side of the box body 1 corresponding to the push rod 15 is provided with a clearance hole, and the clearance hole is provided with a push column 10. The push column 10 and the clearance hole are slidably matched, and the push column 10 and the push rod 15 are concentrically fixedly connected.

[0023] The back of the box body 1 is open. The electric drive mechanism includes a rotating shaft 9, a second micro switch 23, a third micro switch 22 and a motor 20, and the second micro switch 23, the third micro switch 22 and the motor 20 are all electrically connected to the controller 17. The rotating shaft 9 and the motor 20 are both located on the support plate 30, and the two sides of the rotating shaft 9 extend outward from the two sides of the support plate 30 respectively, and the rotating shaft 9 and the support plate 30 are in a rotational fit, and the rotating shaft 9 has an output gear 18, and the output shaft of the motor 20 is in a linkage fit with the output gear 18. A fan-shaped piece 28 is concentrically fixed on the section of the rotating shaft 9 between the support plate 30 and the back of the box body 1. The fan-shaped piece 28 is parallel to the support plate 30. A guide rod 27 is provided between the fan-shaped piece 28 and the back of the box body 1. A slider 24 is provided on the guide rod 27. An eccentric pin is fixed on one side of the fan-shaped piece 28 close to the slider 24. The eccentric pin is perpendicular to the fan-shaped piece 28. A bidirectional bearing 26 is provided on the eccentric pin. A second through groove 25 is provided on the side of the slider 24 corresponding to the bidirectional bearing 26. The second through groove 25 is perpendicular to the guide rod 27. The bidirectional bearing 26 is located in the second through groove 25. The second micro switch 23 and the fan-shaped piece 28 are in the same vertical plane, and the distance from the spring of the second micro switch 23 to the rotating shaft 9 is 1. The radius of the fan-shaped piece 28 is equal to that of the fan-shaped piece 28, the third microswitch 22 and the slider 24 are in the same vertical plane, and the distance from the spring of the third microswitch 22 to the rotating shaft 9 is equal to the distance from the side wall of the slider 24 to the rotating shaft 9. When the rotating shaft 9 drives the slider 24 to slide to the side away from the third microswitch 22 through the fan-shaped piece 28, the slider 24 leaves the spring of the third microswitch 22, and the fan-shaped piece 28 abuts against the spring of the second microswitch 23. When the rotating shaft 9 drives the slider 24 to slide to the side close to the third microswitch 22 through the fan-shaped piece 28, the fan-shaped piece 28 leaves the spring of the second microswitch 23, and the slider 24 abuts against the spring of the third microswitch 22.

[0024] The output gear 18 is located between the support plate 30 and the front of the box body 1. A driving gear 21 is fixed to the output shaft of the motor 20. The driving gear 21 is connected to the output gear 18 through a reduction gear set 19, so that the output shaft of the motor 20 and the output gear 18 are in linkage cooperation.

[0025] In order to facilitate manual rotation, the output gear 18 is connected to the rotating shaft 9 through a one-way bearing. A second clearance hole is provided on the front of the box body 1 corresponding to the rotating shaft 9, one end of the rotating shaft 9 is located in the second clearance hole, and the two are rotationally matched, and a rotating groove 7 is provided on the end surface of the rotating shaft 9.

[0026] For ease of operation, an opening button 3, a closing button 4 and a power switch 5 are provided on the front of the box body 1, and a wiring head 11 is provided on the side wall of the box body 1. The wiring head 11, the power switch 5, the opening button 3 and the closing button 4 are electrically connected to the controller 17.

[0027] In order to facilitate understanding of the real-time data of the circuit breaker, an information display screen 8 is provided on the front of the box body 1 , the information display screen 8 is connected to the operation button 6 , and the information display screen 8 is electrically connected to the controller 17 .

[0028] When in use, the electric operating mechanism of the molded case circuit breaker of the present invention is installed on the circuit breaker, with the back of the box body 1 facing the front of the circuit breaker, the handle of the circuit breaker is located in the second through groove 25, the top rod 15 is against the trip button of the circuit breaker, and the controller 17 is connected to the Internet of Things control terminal.

[0029] When the remote control is closed, the Internet of Things control terminal sends a closing command to the controller 17, and the controller 17 controls the motor 20 to rotate. The motor 20 drives the rotating shaft 9 and the fan-shaped piece 28 to rotate through the driving gear 21, the reduction gear group 19 and the output gear 18. The fan-shaped piece 28 drives the slider 24 to slide to the side away from the third microswitch 22 through the bidirectional bearing 26. The slider 24 leaves the spring of the third microswitch 22, and the slider 24 drives the handle of the circuit breaker to reach the closing position. The circuit breaker is closed, and the fan-shaped piece 28 is against the spring of the second microswitch 23. At this time, the controller 17 can receive the opening signal.

[0030] When the remote control is to open the circuit breaker, the Internet of Things control terminal sends an opening command to the controller 17, and the controller 17 controls the motor 20 to reverse. The motor 20 drives the rotating shaft 9 and the fan-shaped piece 28 to reverse through the driving gear 21, the reduction gear group 19 and the output gear 18. The fan-shaped piece 28 drives the slider 24 to slide to the side close to the third microswitch 22 through the bidirectional bearing 26. The slider 24 drives the handle of the circuit breaker to reach the opening position, the circuit breaker opens, the fan-shaped piece 28 leaves the spring of the second microswitch 23, and the slider 24 is against the spring of the third microswitch 22. At this time, the controller 17 can receive the closing signal.

[0031] When the switch is opened for equipment maintenance, the staff uses the key to turn the lock cylinder to drive the rotating sleeve 16 to rotate. The spiral surface of the outer boss 14 drives the push rod 15 through the connecting rod 29 to push the molded case circuit breaker release button, so that the circuit breaker is in a release state, ensuring that the molded case circuit breaker cannot be closed when the manual operating handle is used; at the same time, the protrusion 13 of the rotating sleeve 16 presses the reed of the first microswitch 12, so that the controller 17 stops working and does not receive signals. Even if the Internet of Things control terminal sends a closing signal, the controller 17 will not control the electric operating mechanism to make a closing action, thereby ensuring that the molded case circuit breaker will not be closed due to misoperation, avoiding safety hazards when the staff is repairing the equipment.

Claims

1. An electric operating mechanism for a molded case circuit breaker, comprising a box body (1), wherein a controller (17) and an electric drive mechanism are arranged in the box body (1), and the electric drive mechanism and the controller (17) are electrically connected; characterized in that The box body (1) has a vertically arranged support plate (30), the support plate (30) has a limit hole, a push rod (15) is arranged in the limit hole, the push rod (15) is perpendicular to the front side of the box body (1), the two ends of the push rod (15) extend from the two sides of the support plate (30), and the push rod (15) and the limit hole are slidably engaged; a rotating sleeve (16) is arranged in the box body (1) on one side of the push rod (15), the rotating sleeve (16) is parallel to the push rod (15), an outer boss (14) is arranged on the outer side wall of the rotating sleeve (16), the outer boss (14) away from the front side of the box body (1) has a spiral surface, and a radially arranged connecting rod (29) is arranged on the push rod (15), and the connecting rod (29) is connected to the outer boss (14). The spiral surface of the boss (14) abuts against each other; a lock hole is provided on the front side of the box body (1) corresponding to the rotating sleeve (16), a mechanical lock (2) is fixed in the lock hole, and a rotating lock core of the mechanical lock (2) is concentrically fixedly connected to the rotating sleeve (16); a first micro switch (12) is provided in the box body (1), the first micro switch (12) is electrically connected to the controller (17), the first micro switch (12) is located on one side of the rotating sleeve (16), and a protrusion (13) is provided on the side wall of the rotating sleeve (16) corresponding to the first micro switch (12), and when the connecting rod (29) is located at the high point of the spiral end surface of the rotating sleeve (16), the protrusion (13) abuts against the spring sheet of the first micro switch (12), and the controller (17) is in a state of being ... the controller (17) stops working; the back of the box body (1) is open; the electric drive mechanism comprises a rotating shaft (9), a second micro switch (23), a third micro switch (22) and a motor (20); the second micro switch (23), the third micro switch (22) and the motor (20) are all electrically connected to the controller (17); the rotating shaft (9) and the motor (20) are both located on the support plate (30); the two sides of the rotating shaft (9) extend outward from the two sides of the support plate (30); the rotating shaft (9) and the support plate (30) are rotatably matched; the rotating shaft (9) is provided with an output gear (18); the output shaft of the motor (20) is in contact with the output gear (18) ) are linked together; a fan-shaped piece (28) is concentrically fixed on the rotating shaft (9) between the support plate (30) and the back of the box body (1), the fan-shaped piece (28) is parallel to the support plate (30), a guide rod (27) is provided between the fan-shaped piece (28) and the back of the box body (1), a slider (24) is provided on the guide rod (27), an eccentric pin is fixed on one side of the fan-shaped piece (28) close to the slider (24), the eccentric pin is perpendicular to the fan-shaped piece (28), a bidirectional bearing (26) is provided on the eccentric pin, a second through groove (25) is provided on the side of the slider (24) corresponding to the bidirectional bearing (26), the second through groove (25) is perpendicular to the guide rod (27), and the bidirectional bearing (26) is located in the second through groove (25);The second micro switch (23) and the fan-shaped piece (28) are in the same vertical plane, and the distance between the spring piece of the second micro switch (23) and the rotating shaft (9) is equal to the radius of the fan-shaped piece (28); the third micro switch (22) and the slider (24) are in the same vertical plane, and the distance between the spring piece of the third micro switch (22) and the rotating shaft (9) is equal to the distance between the side wall of the slider (24) and the rotating shaft (9); when the rotating shaft (9) drives the slider through the fan-shaped piece (28), the third micro switch (22) and the slider (24) are in the same vertical plane. When the block (24) slides toward a side away from the third micro switch (22), the slider (24) leaves the spring sheet of the third micro switch (22), and the fan-shaped sheet (28) abuts against the spring sheet of the second micro switch (23); when the rotating shaft (9) drives the slider (24) to slide toward a side close to the third micro switch (22) through the fan-shaped sheet (28), the fan-shaped sheet (28) leaves the spring sheet of the second micro switch (23), and the slider (24) abuts against the spring sheet of the third micro switch (22).

2. The electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that A first clearance hole is provided on the support plate (30) corresponding to the rotating sleeve (16), one end of the rotating sleeve (16) and the outer boss (14) are both located in the first clearance hole, the rotating sleeve (16) and the outer boss (14) are rotationally matched with the first clearance hole, a first through groove is provided on the section of the support plate (30) between the limiting hole and the first clearance hole, so that the limiting hole is connected to the first clearance hole, and the connecting rod (29) is located in the first through groove.

3. The electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that A clearance hole is provided on the front side of the box body (1) corresponding to the push rod (15), and a push column (10) is provided in the clearance hole. The push column (10) and the clearance hole are slidably matched, and the push column (10) and the push rod (15) are concentrically fixedly connected.

4. The electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that The output gear (18) is located between the support plate (30) and the front face of the box body (1). A driving gear (21) is fixed on the output shaft of the motor (20). The driving gear (21) is connected to the output gear (18) via a reduction gear set (19), so that the output shaft of the motor (20) and the output gear (18) are in linkage cooperation.

5. The electric operating mechanism of a molded case circuit breaker according to claim 4, characterized in that The output gear (18) is connected to the rotating shaft (9) via a one-way bearing; a second clearance hole is provided on the front side of the box body (1) corresponding to the rotating shaft (9); one end of the rotating shaft (9) is located in the second clearance hole, and the two are rotationally matched; a rotating groove (7) is provided on the end surface of the rotating shaft (9) at this end.

6. The electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that The front of the box body (1) is provided with an opening button (3), a closing button (4) and a power switch (5); the side wall of the box body (1) is provided with a wiring head (11); the wiring head (11), the power switch (5), the opening button (3) and the closing button (4) are all electrically connected to the controller (17).

7. The electric operating mechanism of a molded case circuit breaker according to any one of claims 1 to 6, characterized in that An information display screen (8) is provided on the front of the box body (1), the information display screen (8) is connected to an operation button (6), and the information display screen (8) is electrically connected to the controller (17).

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